US5908703A - Alkali-free aluminoborosilicate glass and its use - Google Patents

Alkali-free aluminoborosilicate glass and its use Download PDF

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Publication number
US5908703A
US5908703A US08/848,239 US84823997A US5908703A US 5908703 A US5908703 A US 5908703A US 84823997 A US84823997 A US 84823997A US 5908703 A US5908703 A US 5908703A
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United States
Prior art keywords
sub
glass
weight
bao
mgo
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Expired - Fee Related
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US08/848,239
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English (en)
Inventor
Peter Brix
Ludwig Gaschler
Thomas Kloss
Gerhard Lautenschlager
Klaus Schneider
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Schott AG
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Schott Glaswerke AG
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
    • C03C1/004—Refining agents
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
    • C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
    • C03C3/093—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium containing zinc or zirconium
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]

Definitions

  • the invention includes an alkali-free aluminoborosilicate glass for use in display technology, which can be produced with good quality by the float process.
  • Glasses that are to be used as substrates in LCDs Liquid Crystal Displays
  • AMLCDs Active Matrix Liquid Displays
  • TFELDs Thin-Film Electroluminescent Displays
  • PDPs Plastic Display Panels
  • these glasses should be as alkali-free as possible to keep integrated circuits, which can be placed directly on the glass substrate, from being "contaminated” by diffusing alkali ions. In this case, production-related proportions of sodium oxide can be tolerated up to a content of 1,000 ppm in the glass.
  • the glass panes that are suitable for the production of flat displays must have good dimensional stability at temperatures that occur in the production process, low shrinkage (compaction), and very good quality with regard to the absence of crystalline inclusions, knots, and bubbles.
  • V1 a commercially available glass
  • This glass is produced according to a special "overflow-fusion" process, which ensures the fabrication of thin glasses with high surface quality.
  • the glasses that are suitable for this process should exhibit only an extremely slight tendency toward crystallization, i.e., the liquidus temperature (any crystals that form dissolve again above this temperature) must lie considerably below the processing temperature V A (temperature for viscosity at 10 4 dPas). This may also be the main reason for the very high V A value of this glass of >1,300° C.
  • V A temperature for viscosity at 10 4 dPas.
  • glass composition ranges (% by weight based on oxide) that are similar to the composition of glass V1 are indicated for halogen light bulbs: SiO 2 55-70; B 2 O 3 0-10 ; Al 2 O 3 13-25 ; alkaline-earth oxides 10-25 .
  • No indications are given regarding refining, however.
  • the thermal expansion values of these glasses are low; the temperatures for the viscosity of 10 13 dPas are high. Their chemical stability is not described.
  • Japanese laid-open specification J 2-133 334 A describes alkali-free glasses for electronic components, which have good thermal stability, chemical stability, and optical homogeneity and have the following composition ranges (% by weight based on oxide): SiO 2 54-60; B 2 O 3 6-10; Al 2 O 3 10-15 ; MgO 0-2 ; CaO 8-15 ; BaO 4-10 ; ZnO 1-6 ; TiO 2 and/or ZrO 2 0.3-4.
  • EP 0 672 629 A2 describes aluminosilicate glasses for flat displays. It shows various composition ranges with various thermal expansion coefficients and different qualities relative to acid stability, which all require relatively large amounts of alkaline-earth oxides.
  • German laid-open specification DE-AS 20 58 210 describes borosilicate glasses that have separate phases and contain at least 55-70% by weight of SiO 2 , 1-8.3% by weight of B 2 O 3 , 7-23% by weight of Al 2 O 3 , and 6.7-16.5% by weight of MgO. These components ensure phase separation using heat treatment.
  • An object of this invention is to find a transparent glass for use in display technology, which has a thermal expansion coefficient ⁇ 20/300 of about 3.7 ⁇ 10- 6 /K, a temperature at the viscosity of 10 13 dPas of above 700° C., and a processing temperature V A of less than 1,220° C., has very good chemical stability, and is basically free of alkali oxides. In addition, it is to be free of readily reductive components and thus can be produced on a float unit.
  • the glass contains relatively little SiO 2 , namely 48 to ⁇ 55% by weight. In the case of still smaller proportions, thermal expansion ⁇ increases to a high value and the good hydrolytic stability deteriorates; at higher proportions, V A increases to a high value, and the glass is more difficult to process.
  • the range of from 49 to 53% by weight is therefore preferred.
  • the good chemical stability and high devitrification stability are promoted by the high Al 2 O 3 content of >20 to 26% by weight. Only above 26% by weight does V A rise too much and increase the tendency toward phase separation. Starting from 20% by weight and less, devitrification stability and the temperature of the 10 13 dPas viscosity decrease greatly.
  • the range is preferably from >20 to 24% by weight.
  • a glass of a similar composition is described. It is distinguished from the glass according to the invention at least by its higher SiO 2 content (52-62% by weight) and its lower proportion of Al 2 O 3 (12-20% by weight). In comparison to that glass, the glass that is described in this application has a higher devitrification stability and a lower processing temperature V A while maintaining the desired thermal expansion and high chemical stability.
  • B 2 O 3 is used at a proportion of at least 7% by weight in the alkali-free glasses according to the invention for the above-described reason.
  • a high proportion of boron oxide is also desirable for good chemical stability and devitrification stability, as well as for electrical insulating ability.
  • the melt's attack on the refractory materials is also reduced.
  • the proportion of B 2 O 3 must not be more than 15% by weight, however, since otherwise the temperature for the 10 13 dPas viscosity no longer reaches the desired high value. The range between 9 and 13% by weight is preferred.
  • the good chemical stability of the glass is indicated by the data in the Table.
  • the hydrolytic resistance according to ISO 719 of for example, 10-14 ⁇ g of Na 2 O/g is considered a "very high resistant glass”; see Schott, TECHNICAL GLASSES: Physical and Chemical Properties, ed. 1990, Mainz, Germany.
  • the alkaline-earth oxides also raise the temperature for the 10 13 dPas viscosity.
  • the glass therefore contains 4 to 12% by weight of CaO (preferably 6-11% by weight), 0-8% by weight of MgO (preferably 0-6% by weight); 0-2% by weight of SrO (preferably 0-1% by weight), and 0-2% by weight of BaO (preferably 0-1% by weight).
  • This low proportion of BaO enhances the desired low density of the glasses.
  • certain precautionary measures are taken in the batch house and during heat processing to adhere to the maximum permissible concentration value. This makes it even more advantageous that in a preferred embodiment of the invention, the addition of this component can be rendered completely unnecessary.
  • the overall proportion of MgO, CaO, SrO and BaO is limited to ⁇ 12% by weight since at higher proportions the tendency toward devitrification increases and ⁇ 20/300 increases to a high value.
  • the two components MgO and CaO are introduced via dolomite, which simplifies the logistics of the mixture preparation.
  • the weight ratio of CaO/MgO is about 1.4.
  • the glass according to the invention contains 1-8% by weight (preferably 2-6% by weight) of ZnO and 0-2% by weight of ZrO 2 .
  • ZrO 2 has a positive effect on chemical stability. Owing to its poor solubility, its proportion, however, should not exceed 2% by weight since otherwise, melt relics, so-called zirconia stones, are unavoidable in the finished glass.
  • An especially preferred glass composition mixture in which, owing to the weighed combination of the components, the properties of the glasses according to the invention are combined especially advantageously, is represented by the following range (in % by weight based on oxide): SiO 2 50-52; B 2 O 3 10.5-12; Al 2 O 3 > 20-22.5; MgO 0-5.5; CaO 6-10; BaO 0-1; ZnO 2-3; ZrO 2 0-2; SnO 2 0.5-1.5.
  • Common salt which is often used in alkali oxide-containing melts and contributes to refining by its evaporation, which starts at about 1,410° C., represents another standard refining agent, whereby a portion of the sodium chloride that is used is found again in the glass in the form of sodium oxide; since display glasses are to be as alkali-free as possible, however, it is also not possible to use this refining agent here.
  • Alkaline-earth chlorides of which especially barium chloride has proven effective, also remain as suitable refining agents since they have a refining potential that is similar to that of common salt.
  • the boiling temperature which is about 150° C. higher, however, also requires correspondingly higher melting temperatures.
  • Another drawback of these components is the considerable toxicity of all soluble barium compounds that has already been mentioned.
  • Very small bubbles that have not risen are resorbed again at the end of the refining phase, i.e., at low temperatures, by the tin monoxide SnO which is now present and in this case oxidizes again into SnO 2 .
  • Another advantage when SnO 2 is used as a refining agent consists in the fact that the diffusion of tin from the float bath into the glass surface is reduced since the difference in concentration as a driving force of diffusion is smaller in the case of tin-containing glasses.
  • the nitrate for stabilizing the quadrivalent tin ions can be introduced by various glass components: e.g., as Ba(NO 3 ) 2 or if, as described as a preferred embodiment, BaO is rendered unnecessary, as Mg(NO 3 ) 2 , Ca(NO 3 ) 2 , Al(NO 3 ) 3 , for example.
  • the glasses according to the invention are extremely well suited for use as substrate glasses in display technology.
  • the glasses according to the invention have the following special advantages.
  • the glasses can be produced on a float unit since they are free of readily reduceable components. Because no As 2 O 3 is used in the refining, from the standpoint of environmental protection there is also the advantage that BaO does not need to be used as a glass component.
  • the glasses have a low processing temperature, which saves energy and money during production.
  • the glasses have very high chemical stability and have only a very slight tendency toward devitrification.
  • the table shows five glasses according to the invention with their compositions and their properties that are indicative of to the invention.
  • the compositions are given in terms of the final glass product.
  • the glasses were smelted from conventional raw materials in quartz crucibles at 1,620° C.; the melt was refined for one and a half hours at this temperature, cast into inductively heated platinum crucibles, and stirred for 30 minutes at 1,550° C. for homogenization.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Compositions (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
US08/848,239 1996-04-30 1997-04-29 Alkali-free aluminoborosilicate glass and its use Expired - Fee Related US5908703A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19617344A DE19617344C1 (de) 1996-04-30 1996-04-30 Alkalifreies Aluminoborosilicatglas und seine Verwendung
DE19617344 1996-04-30

Publications (1)

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Country Status (4)

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US (1) US5908703A (OSRAM)
EP (1) EP0805125B1 (OSRAM)
JP (1) JPH1036133A (OSRAM)
DE (2) DE19617344C1 (OSRAM)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6096670A (en) * 1997-09-11 2000-08-01 Schott Glaswerke Alkali metal-free aluminoborosilicate glass and its use
WO2002014234A1 (fr) * 2000-08-10 2002-02-21 Nippon Electric Glass Co., Ltd. Substrat en verre pour affichage electroluminescent inorganique
US6468933B1 (en) * 1998-09-22 2002-10-22 Nippon Electric Glass Co., Ltd. Alkali-free glass and method of producing the same
US6537937B1 (en) * 1999-08-03 2003-03-25 Asahi Glass Company, Limited Alkali-free glass
US20030170465A1 (en) * 2002-03-06 2003-09-11 Marta Krzyzak Method of making a glass body with a phosphorous- and porous SiO2-containing coating, glass body made thereby and solution for making same
US6671026B2 (en) 2000-01-12 2003-12-30 Schott Glas Flat panel liquid-crystal display such as for a laptop computer
US6698244B1 (en) * 1999-08-21 2004-03-02 Schott Glas Method for refining molten glass
US6852658B2 (en) 2000-01-12 2005-02-08 Schott Glas Flat panel liquid-crystal display, such as for a laptop computer
US6867158B2 (en) 2000-01-12 2005-03-15 Schott Glas Flat panel liquid-crystal display such as for a laptop computer
US20060105899A1 (en) * 2002-07-31 2006-05-18 Remi Jacques Furnace with series-arranged baths for producing glass compounds having a low degree of unmelted material
US20080110775A1 (en) * 2006-11-13 2008-05-15 Theodora Beck Absorbent articles with replaceable core components having stiffness characteristics and method for evaluating such characteristics
WO2008063459A1 (en) 2006-11-13 2008-05-29 Corning Incorporated Alkali-free glasses containing iron and tin as fining agents
US20080269037A1 (en) * 2007-04-27 2008-10-30 Ohara Inc. Glass
US20090181230A1 (en) * 2004-09-18 2009-07-16 Schott Ag Method and device for producing flat glass according to the float method
US20090270242A1 (en) * 2007-06-06 2009-10-29 Nippon Electric Glass Co., Ltd. Alkali-free glass and alkali-free glass substrate
US20140011659A1 (en) * 2011-09-02 2014-01-09 Lg Chem, Ltd. Alkali-free glass and preparation thereof
US8975199B2 (en) * 2011-08-12 2015-03-10 Corsam Technologies Llc Fusion formable alkali-free intermediate thermal expansion coefficient glass
EP2262741B1 (en) 2008-02-26 2017-05-24 Corning Incorporated Fining agents for silicate glasses
US10494293B2 (en) * 2015-11-26 2019-12-03 Schott Ag Thermally tempered glass element and use thereof
CN112441743A (zh) * 2020-11-26 2021-03-05 河南旭阳光电科技有限公司 一种无碱玻璃组合物、无碱玻璃及制备方法和应用

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6508083B1 (en) 1996-08-21 2003-01-21 Nippon Electric Glass Co., Ltd. Alkali-free glass and method for producing the same
DE19840113B9 (de) * 1998-09-03 2016-10-13 Eglass Asia Ltd. Alkalifreie Glaszusammensetzung zur Herstellung von Flachglas
DE19916296C1 (de) * 1999-04-12 2001-01-18 Schott Glas Alkalifreies Aluminoborosilicatglas und dessen Verwendung
DE19934072C2 (de) * 1999-07-23 2001-06-13 Schott Glas Alkalifreies Aluminoborosilicatglas, seine Verwendungen und Verfahren zu seiner Herstellung
DE19939789A1 (de) * 1999-08-21 2001-02-22 Schott Glas Alkalifreie Aluminoborosilicatgläser und deren Verwendungen
DE19942259C1 (de) 1999-09-04 2001-05-17 Schott Glas Erdalkalialuminoborosilicatglas und dessen Verwendungen
DE19959084B4 (de) * 1999-12-08 2005-05-12 Schott Ag Organisches LED-Display und Verfahren zu seiner Herstellung
DE10000836B4 (de) * 2000-01-12 2005-03-17 Schott Ag Alkalifreies Aluminoborosilicatglas und dessen Verwendungen
DE10003948B4 (de) * 2000-01-29 2006-03-23 Schott Ag Verfahren zum Erschmelzen, Läutern und Homogenisieren von Glasschmelzen
DE10034985C1 (de) * 2000-07-19 2001-09-06 Schott Glas Verfahren zur Herstellung von Aluminosilicatgläsern, Aluminosilicatgläser sowie deren Verwendungen
DE10064804C2 (de) * 2000-12-22 2003-03-20 Schott Glas Alkalifreie Aluminoborosilicatgläser und ihre Verwendung
DE10114581C2 (de) * 2001-03-24 2003-03-27 Schott Glas Alkalifreies Aluminoborosilicatglas und Verwendungen
DE10307422B4 (de) * 2003-02-21 2008-08-07 Schott Ag Verwendung eines Glassubstrats zur Herstellung eines Datenspeichers
JP4305025B2 (ja) * 2003-03-31 2009-07-29 日本電気硝子株式会社 無アルカリガラス
JP5874304B2 (ja) * 2010-11-02 2016-03-02 日本電気硝子株式会社 無アルカリガラス
CN104276755B (zh) * 2013-10-31 2017-02-15 东旭集团有限公司 一种高化学耐久性的无碱硼铝硅酸盐玻璃

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US3496401A (en) * 1965-12-30 1970-02-17 Corning Glass Works Glass envelopes for iodine cycle incandescent lamps
DE2058210A1 (de) * 1969-11-26 1971-06-16 Anchor Hocking Corp Borosilicatglaeser
US5489558A (en) * 1994-03-14 1996-02-06 Corning Incorporated Glasses for flat panel display
US5508237A (en) * 1994-03-14 1996-04-16 Corning Incorporated Flat panel display
US5736476A (en) * 1995-09-30 1998-04-07 Schott Rohrglas Gmbh Borosilicate glass of high chemical resistance and low viscosity which contains zirconium oxide and lithium oxide

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JPH0624998B2 (ja) * 1988-11-11 1994-04-06 セントラル硝子株式会社 無アルカリガラス
JPH07277762A (ja) * 1995-02-27 1995-10-24 Hoya Corp 液晶ディスプレイ基板用ガラス

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US3496401A (en) * 1965-12-30 1970-02-17 Corning Glass Works Glass envelopes for iodine cycle incandescent lamps
DE2058210A1 (de) * 1969-11-26 1971-06-16 Anchor Hocking Corp Borosilicatglaeser
GB1338386A (en) * 1969-11-26 1973-11-21 Anchor Hocking Corp Opacified glass articles containing b2o3,s1o2, al2o3 and mgo and process for their manufacture
US5489558A (en) * 1994-03-14 1996-02-06 Corning Incorporated Glasses for flat panel display
US5508237A (en) * 1994-03-14 1996-04-16 Corning Incorporated Flat panel display
US5736476A (en) * 1995-09-30 1998-04-07 Schott Rohrglas Gmbh Borosilicate glass of high chemical resistance and low viscosity which contains zirconium oxide and lithium oxide

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Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6096670A (en) * 1997-09-11 2000-08-01 Schott Glaswerke Alkali metal-free aluminoborosilicate glass and its use
US6468933B1 (en) * 1998-09-22 2002-10-22 Nippon Electric Glass Co., Ltd. Alkali-free glass and method of producing the same
US6537937B1 (en) * 1999-08-03 2003-03-25 Asahi Glass Company, Limited Alkali-free glass
US6698244B1 (en) * 1999-08-21 2004-03-02 Schott Glas Method for refining molten glass
US6671026B2 (en) 2000-01-12 2003-12-30 Schott Glas Flat panel liquid-crystal display such as for a laptop computer
US6852658B2 (en) 2000-01-12 2005-02-08 Schott Glas Flat panel liquid-crystal display, such as for a laptop computer
US6867158B2 (en) 2000-01-12 2005-03-15 Schott Glas Flat panel liquid-crystal display such as for a laptop computer
WO2002014234A1 (fr) * 2000-08-10 2002-02-21 Nippon Electric Glass Co., Ltd. Substrat en verre pour affichage electroluminescent inorganique
US20030170465A1 (en) * 2002-03-06 2003-09-11 Marta Krzyzak Method of making a glass body with a phosphorous- and porous SiO2-containing coating, glass body made thereby and solution for making same
US6998177B2 (en) * 2002-03-06 2006-02-14 Schott Ag Method of making a glass body with a phosphorous- and porous SiO2-containing coating, glass body made thereby and solution for making same
US20060105899A1 (en) * 2002-07-31 2006-05-18 Remi Jacques Furnace with series-arranged baths for producing glass compounds having a low degree of unmelted material
US8196432B2 (en) * 2002-07-31 2012-06-12 Saint-Gobain Glass France Furnace with series-arranged baths for producing glass compounds having a low degree of unmelted material
US20090181230A1 (en) * 2004-09-18 2009-07-16 Schott Ag Method and device for producing flat glass according to the float method
US7696113B2 (en) 2006-11-13 2010-04-13 Corning Incorporated Method of manufacturing alkali-free glasses containing iron and tin as fining agents
US7534734B2 (en) 2006-11-13 2009-05-19 Corning Incorporated Alkali-free glasses containing iron and tin as fining agents
US20090133441A1 (en) * 2006-11-13 2009-05-28 Adam James Gillmar Ellison Method of manufacturing alkali-free glasses containing iron and tin as fining agents
WO2008063459A1 (en) 2006-11-13 2008-05-29 Corning Incorporated Alkali-free glasses containing iron and tin as fining agents
US7935649B2 (en) 2006-11-13 2011-05-03 Corning Incorporated Alkali-free glasses containing iron and tin as fining agents
US20080110775A1 (en) * 2006-11-13 2008-05-15 Theodora Beck Absorbent articles with replaceable core components having stiffness characteristics and method for evaluating such characteristics
EP2484645A2 (en) 2006-11-13 2012-08-08 Corning Incorporated Alkali-free glasses containing iron and tin as fining agents
US20080269037A1 (en) * 2007-04-27 2008-10-30 Ohara Inc. Glass
US8084381B2 (en) * 2007-04-27 2011-12-27 Ohara Inc. Glass
US20090270242A1 (en) * 2007-06-06 2009-10-29 Nippon Electric Glass Co., Ltd. Alkali-free glass and alkali-free glass substrate
US8455378B2 (en) * 2007-06-08 2013-06-04 Nippon Electric Glass Co., Ltd. Alkali-free glass and alkali-free glass substrate
EP3138822A3 (en) * 2008-02-26 2017-06-28 Corning Incorporated Fining agents for silicate glasses
EP2262741B1 (en) 2008-02-26 2017-05-24 Corning Incorporated Fining agents for silicate glasses
US10040715B2 (en) 2008-02-26 2018-08-07 Corning Incorporated Silicate glasses having low seed concentration
US10626042B2 (en) 2008-02-26 2020-04-21 Corning Incorporated Fining agents for silicate glasses
EP3138822B1 (en) 2008-02-26 2023-07-26 Corning Incorporated Fining agents for silicate glasses
US8975199B2 (en) * 2011-08-12 2015-03-10 Corsam Technologies Llc Fusion formable alkali-free intermediate thermal expansion coefficient glass
US9643883B2 (en) 2011-08-12 2017-05-09 Corsam Technologies Llc Fusion formable alkali-free intermediate thermal expansion coefficient glass
US8895462B2 (en) * 2011-09-02 2014-11-25 Lg Chem, Ltd. Alkali-free glass and preparation thereof
US20140011659A1 (en) * 2011-09-02 2014-01-09 Lg Chem, Ltd. Alkali-free glass and preparation thereof
US10494293B2 (en) * 2015-11-26 2019-12-03 Schott Ag Thermally tempered glass element and use thereof
US11021390B2 (en) 2015-11-26 2021-06-01 Schott Ag Thermally tempered glass element and use thereof
USRE49895E1 (en) 2015-11-26 2024-04-02 Schott Ag Thermally tempered glass element and use thereof
CN112441743A (zh) * 2020-11-26 2021-03-05 河南旭阳光电科技有限公司 一种无碱玻璃组合物、无碱玻璃及制备方法和应用

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Publication number Publication date
EP0805125A1 (de) 1997-11-05
JPH1036133A (ja) 1998-02-10
DE59700947D1 (de) 2000-02-10
EP0805125B1 (de) 2000-01-05
DE19617344C1 (de) 1997-08-07

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